A Brighton man suffered life-threatening injuries when he was struck by a vehicle late Friday night.

Christopher Vaught, 24, was taken to the University of Michigan Medical Center in Ann Arbor for treatment, but a spokeswoman there could not immediately give a condition update Sunday.

Livingston County Sheriff's Department officials said there were "several" 911 calls late Friday reporting that Vaught was "in the roadway running at passing vehicles" and that at one point he was lying in the roadway.

Around midnight, Vaught was struck by a 1990 Cadillac Deville that was traveling west on Grand River Avenue near Herbst Road in Brighton Township. The driver, a 28-year-old Brighton resident, was not injured.

Sheriff's officials said alcohol and speed do not appear to be factors for the Cadillac driver. However, alcohol and drugs may be a factor in Vaught's actions, sheriff's officials noted.

The roadway was closed for about two and a half hours while members of the Livingston County Sheriff's Department's Traffic Safety Bureau investigated the scene.

Brighton Area firefighters and Livingston County EMS assisted at the scene.